Pneumatic cleansing apparatus.



A. E. MOORH'BAD. PNEUMATIG GLEANSING APPARATUS. APPL'IOATION FILEDOOTfZIB, 1908.

1,623,090. U v Patented Apu), 1912.

5 SHEETSa-SHEHT l.

iillll |l| un, nimm.

lllmllllll j0u INVENTOR,

AT TORN E Y.

A. B. MOORHEAD. y PNEUMATICI GLEANSING AIvPARATUS.

- APPLIOATION FILED 00T. ga, 1908.

* 5 SHEETS-SHEET 5.

www,

INVENTUR.

ATTQRNEY.

Patented Apr. 9, 1912.

l use `of pneumatlc carpet sweepers or pneu- Lesesaal UNITED STATESParana onirica.

LBET E. MOOREEAD, 0F SAN FRANCSCO, CALIFORNIA, ASSGNOR TO AMERICANROTARY lVALVE COMPANY, 0F CHICAGO, ILLINOIS, .QL CQRPORATIQN 0EILLINOIS;

PNEUMATIC CLEANSNG APPETUS.

Specification ci Letters Fa'tent.

rasee-ted apr. e, isis.

Application'led October 2e, 190B. Serial No; 459,945.

To all whom it may concern:

Be it known that I, ALBERT E. MoouHnAo, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and'useful Improvements in PneumaticCleansing Ap aratus, of which the following is a speci cation.

This invention relates to pneumatic cleansing apparatus, and -itincludes means by which such an apparatus is adapted for use .incleansing, either by suction or by the force of-compressed air, as maybe desired; means of cleansing bythe use of both compressed. air andsuction at the same time;

means whereby accumulated dust or refuse' may be mixed with anddeposited in a body ot' Water and discharged when necessary in aconvenient manneuand Without the necessity o opening tanks or manualremoval; means by which the water used for scrubbing and conducted fromthe scrubbing appliances tothe cleansing apparatus can be automaticallydischarged therefrom into a sewer means by which one or more cleansingappliances and'one or more scrubbing appliances using water can beoperated simul` taneously; means by which scrubbing appliances-n-iay beused not only with Water supplied from the cit-y mains, but also in acirculating system with disinfectant liquid, so that, when saiddisinfectant has been used, lit may be returned to the apparatus andused over agaimand, furthermore, such operation can be carried onsimultaneously with the matic cleansing appliances means embracing areceptacle whichcan be used .not only as a receptacle for dust, but alsoas a compressed air receiver when using air under pressure, togetherwith other features and details of construction in such apparatus, as

l will be hereinafter pointed out.

In the accompanying drawings-Figure 1 is a side elevation of theapparatus; Fig. 2 is a plan view thereof; Fig. 3 is a horizontal sectionon an enlarged scale of the controlling valve of the air pump; Fig. 4 isa vertical, section thereof; Fig. 5 is a transverse vertical section onthe line 5-r5 of Fig. 3; Fig. (i is a transverse vertical section on theline 6 6 of Fig. 3; Fig. 7 is a. transverse vertical section on the line5-5` of Figr 3; Fig. '8 is a perspective view of the valve, detachedfrom steer parts, the packing bars and rings being omitted; Fig. 9 is adetail perspective view of one of the packing bars; Fig. 10 is a detailperspective view of one of the packing rings; Fig. 11 is a longitudinalvertical section of the receiver; Fig. 12 is a transverse section on theline 12-12 of Fig. l1; Fig. 13 a4 transverse section on the line 1t- 13Fic'. 11; Fig. 14 is a 'perspective view the casing for the combinedagitators and propeliers. i

Referring to the drawing, 1 indicates a rectangular hollow base, whichforms both a receiver for containing a body of water and the dust andsweepingscollected by pneumatic sweeping devices used in the system, andalso a support for the mechanismsfor producing and controlling theexhaust or compression. Said mechanisms may be actuated either byelectricity, steam or otherwise, and are herein shown asv actuated bythe' former. Referring to such actuating devices, as shown in thedrawings, 2 indicates an electric motor mounted upon one end of thehollow base 1. Upon the shaft of the motor is a pulley 3 around whichpasses a belt at, which also passes around a large pulley 5l on atransverse shaft 6 carrying a iiy- Wheel 7. The crank 8 of said shaftactuates azpiston 9 reciprocating in the cylinder 10 of an air pump. ISaid pump may be used, as desired, either as an aircompressor `todeliverair to the receiver, or as an air-exhaust pump to exhaust the airfrom said receiver, dependently upon the adjustment of the controllingvalve of the air pump.

Formed integral with the casing of the Working cylinder'is a valve11(Figs. 3 and 4) having a cylindrical valve chamber containing acylindric, rotary' valve 1Q, these parts constituting a valve forcontrolling the entrance of -air to audits exit 'from the ends of thepump cylinder. The details ci construction in said controllingvalve'constitute p. the subject oi' a separate application, Serial'horizontal to a vertical position..

Vthrough the eylindric ,ted in said valve and associated parts, the eembrace features as follows: Said easing is provided at its central partwith an annular chamber 13, connected by a conduit 11i with the interiorof the receiver 1, and at its ends is connected through ports t', 18,with the ends of the pump cylinder. .Said .valve 12 consists of acylindrical shell provided exteriorly with four annular' and having acentral, cylindric surface Q1 arranged to act in connection with a port22 leading to the central annular chamber 13, anden its ends witheylindric surfaces 23' adapted to act in connection with the cylindricports l?, 18. rlhe ivalve 12 is also provided two longitudinal grooves25 in which w ted tivo longitudinal hars 24, arranged metrieallyopposite to each other, uli` f are formed Wi h notches 25a, 251 at theirintersecting points, so that the outer surfaces ot' the packing' ringsare tlush with the outer surfaces oi* the hars.

Thevalre casing is formed with annular 'Water jackets 26, .and also withoil passages 27, terminating over the packing rings Connected vvith oneend ot the valve casing by an eibovv 15 Across the interior et' saidvalve extends diametrieally a partition orweb 31, the

terminal portions of which lie in the same plane but the intermediateportion of which is twisted through halt' a turn. Thus, when the valveis in the angular position shown in `Figs. 3 and si of the drawings, thetermi` nel portions of the Web are vert-ical, but the web at the centralportion Y, the valve is horizontal and is twisted fr un said centralprtion, ,in each direction or The other end the valve, or that adiseentto the inlet oroutlet pipe 1t?, is closed on one side ot the web 31 byan end Wall 30, and provided With an opening 32 at the other side of theweb. Said opening 32 is always in communication with the pipe 16. Adjacent to the closed end oi the valve there are formed in the side Wallthereof, on opposite sides of the web and extending surface 23, twoports 34, and, in like manner, near the partly open end of the valvethere are ormedhen opposite sides of the web and extending trouves .19,having therein packing rings 2O,V

and the packing rings 20- through the cylindric surface 23, two portsI35, 36. 1n its centra-l' part, on which is formed the cylindric surface21, the valve 1s provided in its side Wall with what is practically asingle port 37, although the same is divided by a narrow bridge 3S onwhich is seated the bar 24 on that side of the valve. Said port 37 isalways open to the central annular chamber 13, which latter is connectedto the receiver by means of the passage 14. When the valve is in theposition sho-wn in Figs. 3 and 4, the cylinder port 17 is lconnectedthrough the annular chamber with the receiver, While the cylinder port18 is connected through the passage 32 with exhaust.

By means which vill be presently described, the stem of the valve makesa half 4turn with each half' reciprocal-ion of the piston, and theeffect is that when, for instance, the piston, moving troni lett toright, and drayving in auf trom the receiver, reaches its extremeright-hand position, the valveWill have been turned through onehalt arevolution, so that the outer end ot the cylinder is now connected withexhaust, and the inner end of .the cylinder connected with thereceiver;l Then, upon the return of the piston, air is drawn from thereceiver to the inner end of the cylinder and is expelled from the outerend to exhaust, and so on, thus forming a double-acting suction pump'for drawing air from the receiver and expelling it through the pipe 1G,which then acts as au exhaust pipe.

` The valve stem is given a rotary movement in unison with thereciprocating movemen of the plunger by means of a mitergear t1 upon thetransverse shaft 6, meshing with a miter-gear 4t2 upon a longitudinalshaft 43.. Said shaft 43 is connected with the valve stem 29 through theinterposition of a clutch 14 which permits the valve to be reversed toAchange the operation of the pump from an exhaust pump to a compressor.For this purpose, the clutch 44 con' sists of two parts that are adaptedto be interlocked vvih each other in two diametrically reversed.positions of one of them, and one of which is movable in a direction endWise of the shaft 113. As shown, said clutch consists ot two clutchmembers 44a and 44.". The clutch member 44E is secured 'to the outer endof the valve stem 29 and is provided on its end face with a transverserih adapted to engage u transverse groove in the clutch member 4141. Theclutch member 4ta-b is mounted and adapted to slide endwise, Withoutrotation, on the shaft 4?), so that it may he moved on the shatt towardand from the clutch member 114. A handlevcr 44 is pivoted on a lixedpart of the structure, and has a forked end, the arms ot which engage anannular groove, in the clutch member lll-b, in a familiar manner.

'When it is desired to' reverse the operation half a revolution bymeansof a hand-wheel 45 secured to said stem, an the parts of the: clutch areagain interloc Ied, so as to conh nectthe valve stem with i. he shafte3. The valve havingthus been advanced through one-half a revolution;acts in the opposite -manner to that already described, that isy to say,so that each end of the cylinder is in communication with the receiverat the time that the piston is moving toward said end, and the otherendfof the cylinder is then connected with exhaust, so that the cylindernow acts as a compression pump. p

`The passage from the valve into the pipe 16 is adapted to be closed bymeans of a valve disk 50` carried by a stem 51 which slides in a fixedguidefsleeve- 5l on the elbow t0. Upon the outer end of said 'stein 51is secured a cylindrical vpiston 52 which slides in a cylinder 53 formedon the elbow 15` The inner end of said cylinder is closed by ay head onwhich is formed the guido sleeve 51a. Said valv'e disk 50 is normallyheld in closed position by means of a helical spring 54 which acts topress it toward its seat surrounding the o en end of the valve casing. Adisk 55 'o felt surrounds the stem 51 and is interposed between theouter side of the valve disk 50 and the inner end of the guide-sleeve51*l to cushion the impact of the valve against. the .ia-pid end of saidguide-sleeve. In order to check the too rapid motionr of the valve,there is formed in the side of the cylinder 52- a vent 56, which isadapted to allow the air to escape slowly from or to pass slowly intothe cylinder,

and, for the purpose of regulating the rate of flow at 'which itcan sopass, seid vent is adjustably closed by inea-lis of a pivoted door 57.It is necessary to limit the amount of air which is drawn intoltliepurnp when using it es a compressor, for if the full volume of airwere drawn into the cylinder, the power required to com ress the entirevoluineof air 'so' adniitte might be' too great. In order to so limitthe amount of air thus admitted, this valve is so arranged that itsclosing movement `Will be arrested when the vulve disk is at a shortdistance from its scat, and for this purpose set nuts 58 are applied tothe Velve'st-ern vin contact with the outer face of the piston 52. W'henthe pumppis used. as al compressor, the air being then drawn into thepump cylinder through the pipe 16, the valve disk 50 will assunie-aposition as close to the seat as permitted by thesaid setnuts. 4

Now referring to the vtentures of construction in the apparatus by whichdust and refuse collected by vacuum operated cleansing devices andreturned to theapparatus may be mixed with and deposited' in a bodyx'dfwater contained in the receiver, these parts? are made as follows: Theinlet end of the receiver'is provided with an inlet passage A casing 6lconnecting the elbow, with an inlet pipe 65 which leads to the receiverfrom the various arts or" the building in which the Weuinatic cleansingdevices are to be used. ithin` the receiver 1, adjacent'to its inlet'end, is located a cylindric shell or casing 69, which is arrangedhorizontally and transversely of the receiver, open at its ends andperforated' or apertured in its lower part, as indicated at 80. Saidcasing will be so arranged-with respect to the water level in thereceiver, that the casing will be nearl or Wholly. submerged, andtherefore fully or nearly iilled with vdater. To the lower Harige 61 ofthe elbow 62 is bolted s flange A 66 formed upon a centrally arrangedtubu# lar member 67, attached to the central part of the casing 69, andextending at right 'angles to the saine. The open ends of said shell 69are located near the inner surfaces of the sides of the receiver, Whilethe central member 67 extends longitudinally of the receiver, and theflange 66 on its outer end is secured to the liange 6l Within the inletopening in the end of the receiver. In said cylindric casing 69 arelocated aplurality of rotative agitator blades TO carried by atransverse, horizontal shaft 7l., which ex! tends centrally through saidcasing and rc3 tates in lbearings 72 mounted upon the sides of thereceiver. Said shaft is provided outn side of the receiver with a pulley73 driven by a belt 74 that is trained around. a pulley 7 5 upon theshaft of the electric motor. "When in operation, the agitator bladesJass through or operate in the water contained in said casing. Theagitator blades 70 are referably arranged obliquely, with the blades or"the alternate annular sets inA reversed relation, so that, While theblades of `cach annular set actlike propeller blades to move cr impelthe water in the casing in a direction endwise of the same, the bladesof adjacent sets will act in opposite direction, this construction beingused to increase the agitation of the water resulting from the rotationoi' the blades. As the airis drawn into the receiver from the pipe 65,it enters the central part ofi the casing 69, and passing in bothdirections from its center toward its o )en ends )asses from the latterinto the air space in the up-A per part oit' the receiver. The effect ofthe agitator blades, when rotated, is to continually agitato the Water,and, bring it into intirnate contact with the air drawnjin lfrom' thesuction pipe in the forni of drops or spi-ey. The :tir is therebythoroughly cleansed oi dust and solid refuse, 'which lutter is mixedwith end deposited vin the fc ter und accumulates in the bottom o thereceiver. c

lt is necessary from time to time to discharge from the receiver thewater therein when the latter becomes unduly ludened with dust undrefuse separated from the air. To eect this, water from s. suitablesource of supply is admitted into e, pipe 59 extending horizontally ofthe receiver, Within the seme. Suid pipe is shown es extending throughthe end wall of the receiver, :it the outlet end of the lutter, und nssupported by e. bracket 7G from the tcp' of the receiver. To said pipe59 ere connected depending flexible tubes 77 of rubber or the like undto the lower end of euch of said tubes is connected s rotary sprinkler78. Euch sprinkler 78 consists of u plurality of hollow urine, attachedto and adict-ing from hollow hub, mounted to rotute ou u terminal metalpiece on the lower end of .thc flexible tube, seid arms having laterallydirected discharge or iet openings T9. The o't` water issuing from saidjet ope-iings opere-te by reaction to produce rotative motion inthe'urms of the sprinklers, in u well known manner. Suid sprinklers crelocated neerthe bottoni of the receiver, so that they are. immersed inthe body of water therein contained. lllhen water under pressure isadmitted to said pipe it emerges with considerable force through the jetopenings T9 ot the sprinklers, thereby not' only producing rotary motionin the sume, but acting to thoroughly ugitute 'the water and stir up themud or deposits in thc bottoni ot the receiver. This agitation of thewater und mud is increased by the shaking motion imparted to theflexible hose itself from the back pressure of the jets of water issuingfrom the jet openings T9. The pipe D9 is also provided with dependingbranch pipes Sl.. thc lower ends ot' which are provided with jetopenings or nozzles directed down 'urdly und toward the discharge end ofthe contuincr. The receiver is provided at such discharge end with edischarge out` let 9 P, located et the level ot' the bottom Well of thescid receiver for the discharge of the mud or the muddy water theretrom.

The bottoni well ollthe receiver is preterubly sloped or inclined towardsaid outlet, in order to facilitate the drainage of water from thcreceiver'. A discharge pipe lili will be connected with scid outlet 94,und will lend to n sewer oiothcr lace of discharge.

The apparatus is designed to `be used in connection with vacuum operatedscrubbing; u p pliunccs of that hind in which water used for cleansing'is drawn from u. floor which is scrubbed through the "fiction of' thev-.icuiun created pump is acting as an exhcust pump to proof the conduit83, the pl unfrei' in the pipe G5, when the nir duce s, partiel vacuumin the receiver. lu

such cese the continued operations of scrubbin@l Iand drawing in thewater will result in the accunuilution'oi wat/er in the receiver, und,it such accumulation be ellowed to unduly continue, the water will fillthe receiver and will rise into the pump cylinder. To avoid thepossibility of this tslringplece, there is provided a liquid deliverypump embracing :i pump-cylinder 82 attached to the side wall of thereceiver and communicating with the interior oli' the same by a conduit83 having a depending branch 84 and un upwardly extending brunch 85;.the lat-ter having an opening at its upper end adapted to be closed bya valve 86. Said valve 1s operated by a handle @Tutt-ached to the upperend of a valve stein valve and extends upwardly through the top Wall ofthe receiver. In said pump cylinder reciproca/ted a plunger S8 connectedby u rod 89 withu crunk-pin 90 carried by the transverse she't't il. Thedischarge opening of the pump cylinder is connected by c pipe 91 withthe casing of a check-valve 92 und the lat-ter is connected with a pipe93 with which is connected two brunch pipes 9G and Sl-la. The pipe 9dleeds to the waste pipe @alb und is provided with u hand-operated valve94. The branch 96 is provided with e hand-operated vulve 95 und isconnected with distributing pipes that leed to various points in thebuilding: ln the ordinary operation of thc apparatus, cept ashereinafter described, thc vulve S6 is kept open with the cliect that.so long :is the level of the water in the receiver remains below the topof the conduit S3, no action ci the liquid pump takes place, but. whenthe level ot' the water in the receiver rises, by the -zufcun'iulzitiondue to scru'i 'dup'. above the extendingr brunch 85 8S pumps out u, partot the water and discharges it through the check-vulve 92 und into thesewer.

lt is sometimes desirable to distribute u disinfectant liquid within abuilding. For this purpose the reservoir is lillcd through the pipe 59with the disinfectant liquid to u sutlicient level as is indicated inFig. l2. The vulve SG is then closed, the vulve 94 is closed and thevulve D5 in the pipe 96 is opened. lli/'hen the pump 8S is put intooperation, the disinfecting liquid is drawn from the receiver throughthe open depending brunch S- ot the conduit 83 und is forced through thepipe 96, `from which it will be carried through the distributing pipesto various points in the building.,r where it is desired to use thesuine. Such disintectinu' liquid, utter being used on floors und thelil;e,.1nuy be drawn up or collected by the use of suction devices whichere placed in communication with pipes in the buildin', that areconnected with the top of the upwardly that is attached to the nessuno'return pipe 65. The disinecting liquid rei of supply of compressed airsuch as a sepawith distributing rate air pump and connected with the'pipe 98. Said pipe 97 is controlled by a ha11dop erated valve 98. Bythis means com ressed air can be supplied when desiredto t e pipe 96,Whicln'asv before stated, ,is connected pipes leading to various partso'f the building.

'99 indicatesv a pipe connected with the pipe 96 and supplied with Waterfrom a city main. Said pipe 99 is controlled by a valve 100. A pi e 101,controlled by a. valve 102 connects4 tie pipe 9 6 with the pipe 65.v

.After distributing a disinfectant liquid, or plain water, from the pipe99 through the pipe 96 andthe distributing pipes connected therewith, itwill be necessary to thoroughly 'dry vthe pipes containing the liquid,in orderthat if, on the next o ration, compressed air be deliveredthroug'i the same pipes, no water may be thereby discharged upon thelioors, furniture or other objects. To eliect this result, each timethat the pipe 96 has been used for distributing disinfectant liquid orwater, the valves 98 and 100 are closed and the valve 102 is opened andthe air-pump put in operation as a suction pump. The e'ect being to drawair bach:`

-Ward through the pipe 96, and pipe 101 tothe receiver, thus thoroughlydrying said pipe 96 and the distributing pipes by means of the. airdrawn backwardly through the same. 'I p The pipe 96 constitutes the ipethrough which compressed air will he delivered when the same is desiredfor use in cleaning such objects as can not well be cleaned by the useof vacuum devices. For using compressed air, the water will bedischarged from the receiver and the valve of the air pump reversed, sothat said air pump will operate to deliver air to said receiver. The

'alr compressed in the receiver will then be allowed to pass from thesame through the pipes and 101 tothe pipe 96 and delivered from the samethrough the distributing pipes to desired points in the building. The'Vvalve 95 in said pipe 96 at this time will be closed and the valve 102open. When water from the city mains is to be used for cleansing, thevalves 95 and 102 will be closed,l

and the valve 100 in the water supply pipe 99, opened, thus admittingwater instead of.

compressed air to the pipe 97 for distribution to the different parts ofthe building. Atthis time the air pump ma be operated as an exhaustpump, so that t e Water used may be sucked yn by vacuum operatedcleansing or scrubiiing devices andA drawn back into the receiverthrough the return pipe 65.

If air be supplied to the pipe 96 from the pipe 97,- receiving itssupply of air under pressure from a separate air-pump or someother-source of supply, the compressed air will be distributed to thevarious parts of the building through the distributing pipes connectedwithsaid pipe 96, and the dust dislodged from the objects being cleansedby the action of the compressed au', may be`75 v drawn up orcollected-by vacuum operating cleansing devices, connected With thereturn pipe 65, and returned thereto to the receptacle of theapparatus;l the air-pump in. this operation being operated to exhaustthe air from the receiver, and the' valves 95 and 102 being closed.

By the employment of the several features and combinations of partshereinbefore-described, I am enabled to obtain results and advantages asfollows: By reason ofthe employment of an air pump provided with a valvewhich is reversible so that the pump is convertible into either anexhaust pump or a compressor, the apparatus may be used in connection.with cleaning devices operating either by suction or by air-press sure.By the use of theair'pump acting to exhaust air from the receiver, inconnection with a pipe furnishing air under pressure from a separatesource ot' air supply, air

under pressure may be supplied for the purpose o dislodging dust fromarticles by the action of an air blast While at the same time, air maybe exhausted from pipes with which vare connected cleaning devices thatare op By the connection of a Water supply pipe 115 with the pipeleading to theJ places to be cleaned, in connection Awith the receiverand air-pump when operating as anv exhaust pump, Water used forscrubbing may be re ,turned to the apparatus through the ref turn ,pipeconnected with the receiver, so that vacuum operated cleaning devicesand scrubbing app iances can be used simultaneously. By the use-of theliquid pump and its delivery pipe, in connection withv the air pumpacting asan exhaust pump, a disinfecting liquid can be' delivered tovarious points in a building, and suchr liquid infecting fluid from thesaine to. the dis-d tributing pipe. Moreover, theeinployment of areceiver adapted tocoutam a body of water, together with an air pumpadapted to compress the air into the receiver, and also exhaust airtherefrom, and me us for mixing the dust with the Water in the receiverand for discharging the water therefrom when desired, enables the sameapparatus to be used at one time for furnishing air under pressure tocleansing devices and at another time to receive and dispose of the dustand dirtkgathered by the action of vacuum operated cleaning devices.

T he features of construction herein shown and described, in connectionwith. the air pump, constitute the subject of the application, SerialNo. 623,293, hereinbeforeA referred to, tiled as a division of thisapplication.

rl'he features herein illustrated and described, whereby accumulateddust or refuse may be mixed with and deposited in the body of Watercontained in the receiver of the apparatus and said Water and dust orrefuse may be removed or discharged from said receiver, constitute thesubject of a separate application, Serial No. 640,967, filed July 28th,1911, as another division of this application.

The features of construction Aherein illustrated and described,embracing means for supplying to the apparatus water or air, or both,from sources of supply separate from the pumps illustrated as part ofthe apparatus, constitute the subject-matter of a separate application,Serial No. 662,088, tiled November 24:, 1911, as still another divisionof this application.

It is to he understood that an apparatus embodying the general featuresof construction hereinbefore set forth maybe variously modified Withoutdeparture from my invention-aud l do not, therefore, desire to belimited to the specific features of construction illustrated intheiaccompanying drawings, except so f ar as the saine may bespecifically claimed in the appended claims.

I claim as my invention 1. ln a pneumatic cleaningv apparatus, the''combination of receiver, a pump connected with the receiver provided,with a reversible controlling; valve, and adapted to either exhaust airfrom or deliver air to 2. ln a `puclimatic cleansing apparatus;

the combination of receiver, an air putt-ip connected With the said.receiver, a return. pipe connectedwith the inlet of said receivcr, meansfor supplying Water to said receiver, a liquid pump having its inletpassage connected with the receiver, a de livery pipe 'leading from thedischarge passage of said. liquid pump', an means for actuating said.air and liquid. pumps.

In a pneumatic cleansing appara-tus, the combination of a receiver, anair pump connected With the upper part of the ceiver, an air pipeconnected with the receiver, a liquid pump having its inlet passageconnected with the lower part of the receiver, a delivery pipe leadingfrom said liquid pump, a waste pipe leading from said liquid pump,valves in said delivery waste pipes, and means for actuating said airand liquid pumps.

Ll. In. a pneumatic cleansing apparatus,

the combination of a receiver, an

liaust pump connected with the top of the receiver, a return pipecennect'ed with inlet of the receiver, a liquid pump for removingsurplus water from the receiver, a Waste pipe leading from the outlet ofsaid liquid pump, and means for actuating said air and liquid pumps.

5; In a pneumatic cleansing apparatus, the combination of a receiver, anairx e2:-

haust pump connected with the top partot the receiver, a return pipeconnected with the inlet of the receiver, a liquid pump f dischargingsurplus water from the i'eeei. si., a delivery pipe leading from. theoutlet et said liquid pump, a Waste pipe leading; from the. outlet ofsaid liquid pump, valves in said4 delivery and Waste pipes, and loractuating,- said air and liquid pumps.

(l. In a pneumatic cleansing apparatus, the combination of a receiver,an exhaust pump connected therein" h., a return pipe connected with. thela: .inlet of therceeiver, or 0removing surplus iva-ter a liquid pumpil: from the receiver, 'said pump having au inlet passage provided. withvertically separated inlet openings, and a valve for opening and closingthe uppermost. of said inlet openings.

7. ln a pneumatic cleansing apparatus, the combination of areceiver, anair-pump connected with said receiver, provided withl a reversiblecontrolling valve, and adapted to either exhaust air from or deliver''i' to said receiver, a return pipe connect with the outlet of said'receiver, a liquid pump inmenso4 A. 7

for removing Water from said receiver, a In testimony whereof I havehereunto set delivery pipe leading from the outlet of my hand in thepresence of two subscribing 10 aild liquid pump17 a pipe connecting saidWitnesses.

e ivery pipe Wit said return pipe, a valve 5 in said connecting pipe, avalve in said de- ALBERT E' MOORHEAD'.

livery pipe between the outlet of the liquid .,Witnesses:

I pump and the connecting pipe, and means .ff FRANCIS M. WRIGHT,

for actuating said air and liquid pumps. D. B. RIoHARD's.

